You will probably get similar questions i thought.
I have not used a trezor yet so not familiar with them, can the Treazor be "cleaned" completely so it is just as safe if straight from the factory and this checked?
Hmm well its in a sealed box if that answers that
The trezor is a much more advanced device i believe so it should not be a big problem for someone who knows what they are doing with this stuff and anyone buying this beauty should know what to do.
Good luck with your sale
Maybe this will be helpful to communicate alongside with the sealed box: http://doc.satoshilabs.com/trezor-faq/threats.html#reflashing-the-trezor-with-evil-firmware
Fake Trezor devises are a bit scary, has anyone seen these being sold yet (probably best not to put a link to sales if there are any, just yes or no would be better)
Are you still selling it for 2.2BTC at current rates compared to what the price was back in May when you last lowered the price?